“…Lowparameter models of mono-and polydisperse, in the case of low sources -light impurities can be used to reconstruct contamination fields. The features of the models (namely, the presence of aggregated parameters) make it possible to numerically reconstruct the concentration field with a limited set of ground-based observations [3,13,14,15]. The use of multispectral satellite images makes it possible to calculate the Normalized Difference Snow Index (NDSI), which indirectly characterizes the presence of impurities in the snow [16,17].…”